RDL introduces the world's first full-featured, "Green" Mixer Amplifiers. HD Series amplifiers feature proprietary circuitry that shuts down unused portions of the product when no audio signal is present. This coupled with a Class-D output stage provides significant energy savings over other OEM 35 Watt amplifiers.

HD Series amplifiers are available in constant voltage (25 V, 70 V or 100 V) as well as 4 Ohm / 8 Ohm.